16.2.1 Built-in bool type

C++ introduced a built-in boolean data type called bool. The
presence of this new type makes it unnecessary to use an int with
the values 0 and 1 and improves type safety. The two
possible values of a bool are true and false--these
are reserved words. The compiler knows how to coerce a bool into
an int and vice-versa.

If your compiler does not have the bool type and false and
true keywords, an alternative is to produce such a type using a
typedef of an enumeration representing the two possible values:

enum boolvals { false, true };
typedef enum boolvals bool;

What makes this simple alternative attractive is that it prevents having
to adjust the prolific amount of code that might use bool objects
once your compiler supports the built-in type.

This document was generated
by Gary V. Vaughan on February, 8 2006
using texi2html